Joshua Aaron Mandel is an American far-right politician who served as the 48th treasurer of Ohio from 2011 to 2019. A member of the Republican Party, he previously was the Ohio State Representative for the 17th district from 2007 to 2011. He was the unsuccessful Republican challenger to Democratic incumbent Sherrod Brown in the 2012 U.S. Senate election.

The treasurer of the U.S. state of Ohio is responsible for collecting and safeguarding taxes and fees, as well as managing state investments. The Treasury was located in the Ohio Statehouse from 1861 to 1974, when it was moved to the Rhodes State Office Tower. The original office in the statehouse, which has been restored to its 19th-century appearance, is used for ceremonial events.